Joint material and execution method thereof

ABSTRACT

A joint member is provided that can be easily installed, without sacrificing an appearance, in a joint groove required to secure water-tightness between adjoining wall surface facing members of a building. A joint base member  6  is integrally and consecutively installed on a surface of a synthetic resin joiner  4  positioned and provided between wall surface facing members A. The joint base member  6  has right and left side plates  12 , two soft sealing tongue flaps  14   a  and  14   b  which are protuberantly provided on the outer side surfaces of the side plates and the distal ends of which come in contact with end surfaces of the wall surface facing members, and numerous apertures  16  drilled between the sealing tongue flaps, a sealant  8  being charged in a gap between the side plates. A core member  10  pushed into the gap between the side plates  12  of the joint base member is formed by consecutively installing a core portion  10 A for pushing out the sealant  8  through the apertures by being pushed into the gap between the side plates  12 , and a jaw plate of a head portion  10 B that covers a mouth portion of a joint groove. The core portion  10 A has a length that does not cause itself to reach a bottom portion of a sealant charge area S 3  between the side plates  12  when the core portion  10 A is pushed in.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a joint member for a joint grooverequired to secure water-tightness between adjacent wall surface facingmembers in a building, and an installation method for the same.

2. Discussion of the Background

Hitherto, as a means for sealing a joint groove between adjacent wallsurface facing members A of a siding or the like in a building, ahat-shaped joiner 50 shown in FIG. 11 is fixed to a bed member 51 suchas a furring strip, and a sealant 52 is charged in a joint groove formedby abutting the wall surface facing members A against both side surfaces50 a of a protuberance of the joiner 50 so as to enhance thewater-tightness of the joint groove.

The conventional means for sealing a joint groove, however, requiresthat masking be provided before installation to prevent a sealant fromadhering to the wall surface facing members A prior to charging thesealant 52. The installation is not only cumbersome but also requiresskill because the surface of the sealant 52 must be made as flat aspossible in order not to ruin an appearance thereof. Furthermore, spotsare produced in some cases when charging the sealant, so that sealingeffect cannot always be enhanced.

SUMMARY OF THE INVENTION

A technological object of the present invention is to provide a jointmember that can be easily installed, without adversely affecting anappearance, in a joint groove required to secure water-tightness betweenadjoining wall surface facing members of a building, and an installationmethod for the same.

Another technological object of the present invention is to provide ajoint member and an installation method for the same that permit easy,reliable sealing in setting a predetermined joint groove between wallsurface facings by using a joiner, by providing the joiner itself with astructure for enabling a joint groove to be easily sealed so as toobviate the need for masking or manual sealant charging.

To these ends, a first joint member in accordance with the presentinvention is comprised of: a joint base member consecutively andintegrally installed on a surface of a synthetic resin joiner providedby being positioned between wall surface facing members on a bed surfaceof a building facing; wherein the joint base member has right and leftside plates, at least two soft sealing tongue flaps protuberantlyprovided on outer side surfaces of the side plates, distal ends thereofbeing in contact with end surfaces of the wall surface facing membersthat constitute inner walls of a joint groove, and many aperturesdrilled between the sealing tongue flaps in the two side plates; asealant of a sufficient amount to be pressed out and charged into aspace to seal the space surrounded by the pair of sealing tongue flapsand the inner side walls of the joint groove is charged between the sideplates of the joint base member; and a sealing member for restrainingoutflow of the sealant is attached to a mouth portion between the twoside plates of the joint base member; and a core member to be pushedinto a gap between the side plates of the joint base member is formed bya core portion that pushes into the gap between the side plates whilepressing the covering member thereby to press the sealant, which hasbeen charged therein, out through the apertures of the side plates, anda jaw plate of a head portion that covers a joint groove mouth portion,the core portion and the jaw plate being consecutively installed suchthat they are formed to have a substantially T-shaped section, and thecore portion having a length that does not cause itself to reach abottom part of a sealant charge area between the sides plates when it ispushed in.

Further, a second joint member in accordance with the present inventionis comprised of: a joint base member consecutively and integrallyinstalled on a surface of a synthetic resin joiner provided by beingpositioned between wall surface facing members on a bed surface of abuilding facing; wherein the joint base member has right and left sideplates, at least two soft sealing tongue flaps protuberantly provided onouter side surfaces of the side plates, distal ends thereof being incontact with end surfaces of the wall surface facing members thatconstitute inner walls of a joint groove, and many apertures drilledbetween the sealing tongue flaps in the two side plates; a sealant of asufficient amount to be pressed out and charged into a space to seal thespace surrounded by the pair of sealing tongue flaps and the inner sidewalls of the joint groove is charged between the side plates of thejoint base member; and a covering member for restraining outflow of thesealant and for restraining a mouth portion between the two side platesfrom narrowing is fitted into the mouth portion between the two sideplates of the joint base member; and a core member to be pushed into agap between the side plates of the joint base member is formed by a coreportion that presses out the sealant, which has been charged by beingpushed into the space between the side plates, out through the aperturesof the side plates by pressing the covering member to push it into thegap between the side plates, and a jaw plate of a head portion thatcovers a joint groove mouth portion, the core portion and the jaw platebeing consecutively installed so that they are formed to have asubstantially T-shaped section, and the core portion having a lengththat does not cause a distal end of the covering member to reach abottom part of a sealant charge area between the sides plates when thecore portion is pushed in.

In the joint member, it is appropriate to form, between sealing tongueflaps on the joiner side in the side plates of the joint base member andthe joiner, a space into which the remainder of the sealant, which ispressed into the space surrounded by the pair of sealing tongue flapsand the inner walls of the joint groove when the core member is pushedinto a gap between the side plates, flows. Furthermore, it is preferableto form a protuberance for setting a minimum width of the joint grooveon the proximal ends of at least one set of sealing tongue flaps atopposing positions of the two side plates, the protuberance beinglocated on outer side surfaces of the two side plates in the joint basemember.

Furthermore, an installation method in accordance with the presentinvention employing the aforesaid joint member is comprised of: a stepfor providing a joiner by positioning a joint base member between wallsurface facing members on a bed surface of a building facing; and a stepfor pushing a core portion of a core member into a gap between sideplates of the joint base member filled with a sealant, or pushing in thecore portion of the core member while pushing a covering member, whichhas been fitted into a mouth portion between the two side plates of thejoint base member, to push the sealant out through apertures in the sideplates into a space surrounded by a pair of sealing tongue flapsprotuberantly provided on the outer side surfaces of the side plates andinner walls of a joint groove, and covering a mouth portion of the jointgroove by a jaw plate of a core member head portion at the same time.

Furthermore, a third joint member in accordance with the presentinvention is comprised of: a sealing structural member integrally andconsecutively installed on a surface of a synthetic resin joinerprovided and positioned between wall surface facing members on a bedsurface of a building facing; wherein the sealing structural member hasflexible right and left side plates and soft sealing flaps protuberantlyprovided on outer side surfaces of the side plates; a core member pushedinto a gap between the side plates of the sealing structural member isformed by a core portion that is pushed into a gap between the sideplates to push and spread the two side plates to press the sealing flapson outer side surfaces of the side plates into contact with inner wallsof a joint groove, and a jaw plate of a head portion for sealing a mouthportion of the joint groove, the core portion and the jaw plate beingconsecutively installed to have a substantially T-shaped section; andengaging portions, which engage with each other when a core member ispushed into the sealing structural member so as to hold the core memberbetween the two side plates in the sealing structural member so that itdoes not slip off, are provided inside the two side plates in thesealing structural member and on the core portion of the core member.

The sealing flaps protuberantly provided on the outer side surfaces ofthe two side plates in the sealing structural member of the third jointmember may be formed by a plurality of soft sealing tongue flaps madeintegral with the side plates.

Furthermore, the engagement between the side plates and the core portionin the core member may be accomplished by engaging a proximal endportion or a distal end portion of the core portion with an engagingportion of an associated side plate.

The following will explain more specifically about the aforesaid jointmember and its installation method. To set the joint member inaccordance with the present invention in a joint groove betweenadjoining wall surface facing members in a building, first, a joiner isprovided with the joint base member positioned between the wall surfacefacing members on a bed surface of a building facing. At this time, thesealing tongue flaps are in elastic and close contact with the endsurfaces of the wall surface facing members so as not to produce aclearance between the wall surface facing members and the joint basemember. Especially when the proximal end portions of at least one set ofthe sealing tongue flaps are provided with protuberances in thepositions where the two side plates of the joint base member oppose eachother, the joint groove of the wall surface facing members can be set toa minimum width by the protuberances.

As described above, when providing the joiner with the joint base memberpositioned between the wall surface facing members, the sealing tongueflaps protuberantly provided on the outer side surfaces of the two sideplates in the joint base member are pressed against the inner walls ofthe joint groove. There is a danger in that the gap between the sideplates reduces due to a reaction force received from the inner walls ofthe joint groove, causing the sealant to flow out through the mouthbetween the two side plates. This problem can be solved by increasingthe strength of the bottom plate portions of the two side plates in thejoiner. Narrowing of the mouth of the two side plates can be restrainedby fitting a covering member into the mouth between both side plates inthe joint base member.

Thereafter, the core portion of the core member is pushed into a gapbetween the two side plates of the joint base member to push the sealantout of the apertures drilled in the side plates of the joint basemember. The sealant is charged in the space surrounded by the pair ofsealing tongue flaps and the inner walls of the joint groove, and theremaining sealant pushes and spreads the sealing tongue flap on thejoiner side of the side plate in the joint base member to flow into thespace between the joiner and the sealing tongue flap. This arrangementprevents the sealant from spreading out of the joint member due tovariations in the width of the joint groove.

To be more specific, the upper surfaces of the sealing tongue flaps comein close contact with the inner walls of the joint groove so that thesealing tongue flaps bend toward the joiner when the end surfaces of thewall surface facing members are pressed into contact. Hence, even if thesealant which has been pushed out fails to be accommodated between thepairs of sealing tongue flaps, the sealant will flow out into the spaceon the side of the joiner through the gap between the sealing tongueflaps on the side of the joiner and the inner walls of the joint groove,so that it will not flow out of the wall surface facing members througha gap between the sealing tongue flaps on the mouth of the two sideplates in the joint base member that is difficult to push and spread bycurving and the inner walls of the joint groove. This arrangementenables the sealant to be effectively used for sealing the joint groovesand also permits variations in the width of joint grooves to besuccessfully handled.

Thus, the first and second joint members described above make itpossible to easily install a joint member in a joint groove required tosecure water-tightness between adjoining wall surface facing members ofa building without adversely affecting an appearance thereof.

Moreover, since the joiner itself is provided with the structure foreasily sealing a joint groove, the need for masking or manual chargingof a sealant can be obviated, permitting easy, reliable sealing.

In addition, an area for accommodating an extra sealant to cope withvariations in the width of a joint groove is secured, preventing thesealant from extending out of the joint member when the core member ispushed in. This arrangement enables effective use of the sealant forsealing the joint groove thereby to provide effective sealing betweenthe joint groove and the inner walls.

Thus, according to the present invention, a joint member can be easilyinstalled, without sacrificing an appearance, in a joint groove requiredto secure water-tightness between adjoining wall surface facing membersof a building. Moreover, since the joiner itself is provided with thestructure for easily sealing a joint groove, the need for masking ormanual charging of a sealant can be obviated, permitting easy, reliablesealing.

In addition, an area for accommodating an extra sealant to cope withvariations in joint grooves is secured, preventing the sealant fromextending out of the joint member when the core member is pushed in.This arrangement enables effective use of the sealant for sealing thejoint groove thereby to provide effective sealing between the innerwalls of the joint groove.

To install the third joint member described above, first, the sealingstructural member is positioned between the wall surface facing members,and a joiner is provided in place. Under this condition, the wallsurface facing members are fixed, then the core portion of the coremember is pushed into a gap between the two side plates of the sealingstructural member. This causes the jaw plate of the core member headportion to primarily seal a mouth portion of the joint groove, and atthe same time, the two side plates of the sealing structural member arepushed and spread, causing the sealing flaps on the outer side surfacesof the side plates to be pressed into contact with the inner walls ofthe joint groove to perform secondary sealing. Furthermore, the engagingportions provided in the two side plates in the sealing structuralmember and the core portion in the core member engage with each other tohold the core member between the two side plates in the sealingstructural member so that it does not slip off. This arrangement makesit possible to positively maintain water-tightness and also toaccommodate variations in the width of joint grooves.

Thus, a joint member can be provided that can be easily installed in adry manner, without sacrificing an appearance, in a joint grooverequired to secure water-tightness between adjacent wall surface facingmembers of a building.

In addition, the joiner itself is provided with the structure for easilysealing a joint groove and is adapted to obviate the need for a wet typesealant. Hence, there is no need for masking or manual charging of asealant, thus permitting reliable sealing to be achieved easily at lowcost.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 a sectional view showing a state of a joint member of a firstembodiment in accordance with the present invention after installation.

FIG. 2 is a sectional view showing a state wherein a sealant has beencharged in a joint base member provided integrally and consecutivelywith a joiner of the first embodiment.

FIG. 3 is a side view of the state shown in FIG. 2.

FIG. 4 is a sectional view of a core member of the first embodiment.

FIG. 5 is a sectional view showing a state of a joint member of a secondembodiment in accordance with the present invention after installation.

FIG. 6 is a sectional view showing a state wherein a sealant has beencharged in a joint base member provided integrally and consecutivelywith a joiner of the second embodiment.

FIG. 7 is a sectional view of a core member of the second embodiment.

FIG. 8 is a sectional view showing a state of a joint member of a thirdembodiment in accordance with the present invention after installation.

FIG. 9 is a sectional view showing a state of a joint member of a fourthembodiment in accordance with the present invention after installation.

FIG. 10(a) is a sectional view of a core member in the joint member of afourth embodiment, and (b) is a sectional view of a joiner made integralwith a sealing structural member of the fourth embodiment.

FIG. 11 is a sectional view showing a conventional example.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The following will describe embodiments of a joint member in accordancewith the present invention in detail with reference to the accompanyingdrawings. FIG. 1 through FIG. 4 show a first embodiment of a jointmember in accordance with the present invention.

In FIG. 1, reference numeral 2 denotes a joint member for sealing ajoint groove at joined portion or the like of a wall surface facingmember (a siding or other facing panel) A of a building. The jointmember 2 is used primarily for a joint groove required to securewater-tightness between adjoining wall surface facing members A in thebuilding. The joint member 2 is schematically formed of a joiner 4, ajoint base member 6 made integral with the joiner 4, a sealant 8, and acore member 10.

As can be seen from FIG. 1, the joiner 4 is positioned and providedbetween adjoining wall surface facing members A on a furring strip C.The furring strip C, which constitute a bed surface of facing, isinstalled to a body of the building via a waterproof sheet B employed asnecessary. The joiner is then fixed to the furring strip C together withthe wall surface facing members A by nails D or the like, enabling thewall surface facing members A to be installed consecutively.

The joint base member 6 consecutively and integrally installed to thesurface of the joiner 4 has its right and left side plates 12 and 12made of a relatively hard synthetic resin consecutively installed to thejoiner 4 at their proximal ends such that it is formed to have asubstantially U-shaped section as clearly shown in FIG. 2 and FIG. 3. Apair of sealing tongue flaps 14 a and another pair of sealing tongueflaps 14 b, which are made of a soft synthetic resin, are protuberantlyprovided aslant downward at upper and lower positions, respectively, onthe outer side surfaces of the respective side plates 12 such that theyare formed integrally with the side plates 12. Protuberances 14 c and 14c for setting a minimum width of a joint groove are provided on theproximal portions of the pair of sealing tongue flaps 14 b and 14 b atpositions near the joiner 4 where they oppose each other in the jointbase member 6.

A sealant 8 having fluidity and viscosity is charged in a space betweenthe two side plates 12 and 12. Numerous apertures 16, through which thesealant 8 is pushed out into a space S1 surrounded by the pairs ofsealing tongue flaps 14 a and 14 b and an inner wall W of the jointgroove as the core member 10 is pushed into the gap between the sideplates 12 and 12, are provided at equal intervals in the lengthwisedirection of the joint base member 6 and in a plurality of rows betweenthe sealing tongue flaps 14 a and 14 b in the two side plates 12. Inadjacent aperture rows, each of the apertures 16 is disposed so that itis positioned between two adjacent apertures 16 and also partly overlapsthe apertures 16 in adjoining rows. This allows the sealant 8 to bepushed out substantially uniformly in the longitudinal direction of thejoint base member 6.

Furthermore, a space S2 is formed between the sealing tongue flaps 14 bfacing the joiner 4 and the joiner 4 in the joint base member 6 asillustrated in FIG. 1. When the core member 10 is pushed into a mouthportion 18 between the two side plates 12 and 12 in the joint basemember 6, if the sealant 8 charged in the space S1 surrounded by thepairs of sealing tongue flaps 14 a and 14 b and the inner walls W of thejoint groove leaves a remainder due to a width of the joint groove, thenthe remainder pushes and spreads the sealing tongues flaps 14 a facingthe joiner 4 to flow into the space S2.

The sealant 8 in an appropriate amount for a relatively large width of ajoint groove, i.e. an amount that is sufficient to be pushed out andcharged in the space S1 surrounded by the pairs of sealing tongue flaps14 a and 14 b and the inner walls W of the joint groove so as to sealthe space, is charged between the two side plates 12 and 12 in the jointbase member 6. The sealant 8 is formed of isobutylene-isoprene rubber ora silicone resin or other rubber type or synthetic resin type elastomer,and it is required to exhibit fluidity and viscosity so that it may bepushed out of the apertures 16 of the side plates 12 when the coremember 10 is pushed into the space between the two side plates 12 and 12in the joint base member 6.

Mold release sheets 20A covering the apertures 16 of the two side plates12 and 12 are attached beforehand to the joint base member 6 into whichthe sealant 8 is charged. After the charging, a mold release sheet 20Bfor inhibiting outflow of the sealant 8 is attached to the mouth portion18 between the two side plates 12 and 12, the mouth portion 18 openingat the top of the joint base member 6. It may be unnecessary to attachthe mold release sheet 20A if the apertures 16 are small and there is nodanger of leakage of the sealant.

As shown in FIG. 1 and FIG. 4, the core member 10 is formed to have asubstantially T-shaped section by consecutively installing a coreportion 10A formed of a relatively hard synthetic resin and a jaw plateof a head portion 10B that covers the mouth of the joint groove. Thecore portion 10A is formed to be a plate substantially as thick as thewidth between the two side plates 12 and 12 in the joint base member 6,a distal end 10 a thereof being formed to be round to ensure smoothinsertion of the core member 10 into a gap between the side plates 12and 12 and smooth flow of the sealant 8. Furthermore, the core portion10A is formed to have a length such that it does not reach a bottomportion of a sealant charge area S3 between the side plates 12, and alsoformed so that the sealant 8 pushed out into the space S1 surrounded bythe pairs of sealing tongue flaps 14 a and 14 b and the inner wall W ofthe joint groove is spread and merged between the distal end of the coreportion 10A and the bottom portion of the sealant charge area S3 betweenthe side plates 12 thereby to maintain reliable sealing. Furthermore,the head portion 10B of the core member 10 has its both wings 10 b infrictional contact with the inner walls W of the joint groove, and it isformed of a jaw plate made of a relatively soft synthetic resin thatcovers the mouth portion of the joint groove.

The mouth edge portions of the inner surfaces of the two side plates 12and 12 in the joint base member 6, and the proximal portions of the twoside surfaces of the core portion 10A in the core member 10 are providedwith engaging portions 22 and 24, respectively, that engage with eachother when the core portion 10A is pushed into a gap between the twoside plates 12 and 12 of the joint base member 6.

The following will describe in further detail the joint member 2 and itsinstallation method. To install the joint member 2 between the adjacentwall surface facing members A in a building, the mold release sheets 20Aare first peeled off from the outer side surfaces of the two side plates12 in the joint base member 6. Then, as illustrated in FIG. 1, thejoiner 4 is provided on the furring strip C installed on a buildingfacing via the waterproof sheet B, with the joint base member 6positioned between the adjoining wall surface facing members A. At thistime, the sealing tongue flaps 14 a and 14 b are brought into elasticcontact with the end surfaces of the wall surface facing members A suchthat no more gap than necessary is allowed between the wall surfacefacing members A and the joint base member 6. In this case, it isdesirable to retain the end surfaces of the wall surface facing membersA in such positions that they do not come in contact with theprotuberances 14 c and 14 c formed on the proximal portions of the pairof sealing tongue flaps 14 b and 14 b in the two side plates 12 of thejoint base member 6 since the protuberances 14 c and 14 c function toset the minimum width of a joint groove formed by the end surfaces ofthe wall surface facing members A.

It is alternatively possible to separately provide the joiner 4 withabutting surfaces to be abutted against the end surfaces of the wallsurface facing members A to set the width of a joint groove.

Thereafter, as the core portion 10A of the core member 10 is pushed intoa gap between the two side plates 12 of the joint base member 6, thesealant 8 is pushed out of the apertures 16 drilled in the side plates12 of the joint base member 6, causing the sealant 8 to be charged inthe space S1 surrounded by the pairs of sealing tongue flaps 14 a and 14b and the inner walls W of the joint groove. If the sealant 8 leaves aremainder, then the remainder pushes and spreads the sealing tongueflaps 14 b facing the joiner 4 of the side plates 12 in the joint basemember 6 to flow into the space S2 between the joiner 4 and the sealingtongue flaps 14 b. This arrangement prevents the sealant 8 fromspreading out of the joint member 2 due to variations in the width ofjoint grooves. The core member 10 is pushed in until the engagingportions 24 in the core portion 10A engage the engaging portions 22 ofthe two side plates 12 and 12 in the joint base member 6. The engagementbetween the engaging portions 22 and 24 retains the core member 10 in apredetermined push-in position.

More specifically, when the end surfaces of the wall surface facingmembers A are pressed into contact, the upper surfaces of the sealingtongue flaps 14 a and 14 b are brought into close contact with the innerwalls W of the joint groove such that they are bent toward the joiner 4.Hence, even if the sealant 8, which has been pushed out, cannot becompletely accommodated in the space S1 between the pairs of the sealingtongue flaps 14 a and 14 b, the sealant 8 will flow out into the spaceS2 on the side of the joiner 4 through the gap between the sealingtongue flaps 14 b on the side of the joiner 4 and the inner walls W ofthe joint groove, so that it will not flow out of the wall surfacefacing members A through a gap between the sealing tongue flaps 14 a onthe mouth portion of the two side plates 12 in the joint base member 6that is difficult to push and spread by curving and the inner walls W ofthe joint groove. This arrangement enables the sealant 8 to beeffectively used for sealing joint grooves and also successfullyaccommodates variations in the width of joint grooves. If less sealantflows out from the space S1, then the sealing tongue flaps 14 a and 14 bmay be slanted upward in advance so as to allow the sealant to flow outinto a gap between the sealing tongue flaps 14 a and the jaw plate ofthe core member head portion 10B.

The joint member described above can be easily installed, withoutsacrificing an appearance, in a joint groove required to securewater-tightness between adjoining wall surface facing members A of abuilding. Moreover, since the joiner 4 itself is integrally providedwith a joint base member 6 filled with the sealant 8 for easily sealinga joint groove, the need for masking or manual charging of the sealant 8can be obviated, permitting easy, reliable sealing. Moreover, the areafor accommodating an extra sealant 8 to cope with variations in thewidths of joint grooves is secured, preventing the sealant 8 fromextending out of the joint member 2 when the core member 10 is pushedin. This arrangement enables effective use of the sealant 8 for sealingthe joint groove thereby to provide effective sealing between the innerwalls W of the joint groove.

FIG. 5 through FIG. 7 illustrate a second embodiment of the presentinvention. A joint member 2 of the second embodiment has a coveringmember 26 fitted in a mouth portion 18 between two side plates 12 in ajoint base member 6 filled with a sealant 8 as clearly shown in FIG. 6.Prior to installation of the joint member 2, the covering member 26 isretained at the mouth portion 18 between the two side plates 12 in thejoint base member 6 by an engagement between engaging portions 28 formedon both side surfaces thereof and engaging portions 22 formed on a mouthedge of the inner side surfaces of the two side plates 12 in the jointbase member 6. The covering member 26 inhibits the sealant 8 fromflowing out through the mouth portion 18 between the two side plates 12in the joint base member 6, and also inhibits the mouth portion betweenthe two side plates from being narrowed by the two side plates beingpushed inward with consequent outflow of the sealant or interferencewith the core member being pushed in. It is also possible to attach amold release sheet 20B, which is for inhibiting the sealant 8 fromflowing out, onto the covering member 26.

When providing the covering member 26, a head portion 27B of a coremember 27 identical to that in the first embodiment is used, and a coreportion 27A of the core member 27 is formed to have a length so that thedistal end of the covering member 26 does not reach the bottom portionof the sealant charge area between the side plates 12 when the coreportion 27A is pushed in. The distal end of the core portion 27A isprovided with a protuberance 27 a that engages a recess formed in thecovering member 26 to stabilize the connection therebetween.

The rest of the configuration and operation of the joint member of thesecond embodiment are substantially identical to those of the firstembodiment; therefore, like reference numerals will be assigned to likeor equivalent components, and the descriptions thereof will be omitted.The method for installing the joint member of the second embodiment isthe same as that of the first embodiment except that the core portion27A of the core member 27 is pushed into a gap between the two sideplates 12 of the joint base member 6 filled with the sealant 8 whilepushing the covering member 26 fitted into the mouth portion between thetwo side plates 12.

FIG. 8 shows a third embodiment in accordance with the presentinvention. A joint member 32 of the third embodiment has a joint basemember 36 made integral therewith via legs 35 arranged in a standingmanner on the surface of a joiner 34 as shown in the drawing.

The joint base member 36 is used for a case wherein the wall surfacefacing members A are thick; it is not particular different in theconfiguration, the operations, and the installation methods from thefirst embodiment except for the legs 35 and sealing tongue flaps 44provided on the legs 35. Hence, like reference numerals will be assignedto like or equivalent components, and the descriptions thereof will beomitted.

The sealing tongue flaps 44 are provided to form a space S2 between thesealing tongue flaps 14 b in the first embodiment and the joiner 34 soas to prevent a sealant flowing into the space S2 from being dissipated.In this embodiment, a case is shown wherein the sealing tongue flaps 44are provided with protuberances 44 c for setting a minimum width of ajoint groove. In the third embodiment also, a covering member 12 similarto that in the second embodiment can be used as a sealing member for amouth portion 18 between the two side plates 12 and 12.

FIG. 9 and FIGS. 10(a) and (b) show a fourth embodiment of a jointmember in accordance with the present invention.

In FIG. 9, reference numeral 102 denotes a joint member for sealing ajoint groove at joined portion or the like of wall surface facingmembers (sidings or other facing panels) A of a building. The jointmember 102 is used primarily for a joint groove required to securewater-tightness between adjoining wall surface facing members A in thebuilding. The joint member 102 is schematically formed of a joiner 104,a sealing structural member 106 made integral with the joiner 104, and acore member 110.

As can be seen from FIG. 9, the joiner 104 is shaped like a tie platepositioned and provided between adjoining wall surface facing members Aon a furring strip C. The furring strip C, which constitutes a bedsurface of facing, is installed to a body of the building via awaterproof sheet B employed as necessary. The joiner 104 is fixed to thefurring strip C by a nail D₁ or the like.

The sealing structural member 106 consecutively and integrally installedto the surface of the joiner 104 has its right and left side plates 112and 112 made of a thermoplastic relatively hard synthetic resinconsecutively and opposingly installed to the joiner 104 at theirproximal ends, the side plates 112 and 112 being curved at their centralportions in directions for narrowing a space therebetween into which thecore member 110 is pushed as clearly shown in FIG. 10(b). Furthermore,three pairs of sealing tongue flaps 114 a, 114 b, and 114 c, which aremade of a thermoplastic soft synthetic resin, are protuberantly providedat top, bottom, and middle of outer side surfaces of the two side plates112 such that they are formed integrally with the side plates 112. Thesesealing tongue flaps 114 a, 114 b, and 114 c constitute a sealingassembly for sealing (secondary sealing) of a joint groove.

As shown in FIG. 9 and FIG. 10(a), the core member 110 is formed to havea substantially T-shaped section by integrally and consecutivelyinstalling a core portion 110A formed of a thermoplastic relatively hardsynthetic resin with a hollow center and a head portion 110B that coversthe mouth of the joint groove. A head portion 110B of the core member110 has its both wings 110 b in frictional contact with the inner wallsW of the joint groove for sealing (primary sealing), and it is formed ofa jaw plate made of a thermoplastic relatively soft synthetic resin thatcovers the mouth portion of the joint groove. The jaw plate of the headportion 110B is formed integrally with the top flat surface of the coreportion 110A except for the portions on both ends thereof; therefore,when it is press-fitted in the joint groove, the portion made integralwith the core portion 110A forms a flat surface, and only both endportions are firmly pressed into contact with the inner walls W of thejoint groove, presenting a superb appearance.

Furthermore, engaging hooks 116A are provided at upper ends of the innersurfaces of the two side plates 112 in the sealing structural member 106such that they oppose each other. In addition, engaging grooves 116B areformed in a depressed manner at proximal end portions of the coreportion 110A where the core portion 110A and the head portion 110B areconsecutively installed in the core member 110. Thus, as the core member110 is pushed into the sealing structural member 106, the engaging hooks116A and the engaging grooves 116B engage each other to form an engagingportion 116 that holds the core member 110 between the two side plates112 in the sealing structural member 106 such that it does not slip off.

Reference numeral 118 in the drawing denotes projections that providelimitation in setting the width of a joint groove. A minimum width of ajoint groove is restricted or a proper width thereof is set by abuttingthe end surfaces of the wall surface facing members A against theprojections 118. The projections 118 may be omitted as necessary;however, they may be provided in the following embodiments.

To install the joint member 102 of the fourth embodiment in accordancewith the present invention that has the configuration set forth above,first, the sealing structural member 106 is positioned between the wallsurface facing members A to provide the joiner 104, and the wall surfacefacing members A are fixed in this state. Then, the core portion 110A ofthe core member 110 is pushed into a gap between the two side plates 112and 112 of the sealing structural member 106. This causes the jaw plateof the head portion 110B of the core member 110 to provide the mouthportion of the joint groove with the primary sealing. At the same time,the two side plates 112 of the sealing structural member 106 are pushedand spread by the core member 110A to cause the sealing tongue flaps 114a, 114 b, and 114 c on the outer side surfaces of the side plates 112 tobe pressed into contact with the inner walls W of the joint groove toperform the secondary sealing. Furthermore, the engaging projections116A formed on the two side plates of the sealing structural member 106and the engaging grooves 116B formed in the core portion 110A of thecore member 110 engage with each other to hold the core member 110between the two side plates 112 and 112 in the sealing structural member106 such that it does not slip off. This arrangement makes it possibleto securely maintain water-tightness and also to successfully cope withvariations in the width of joint grooves.

Furthermore, the two side plates 112 and 112 are curved at their centralportions in directions for narrowing the space into which the coremember is pushed, and the core member 110 having both side surfaces ofthe core portion 110A substantially in parallel is pushed in the gapbetween the side plates 112 and 112. Hence, the sealing tongue flaps 114a, 114 b, and 114 c are not firmly pressed into contact with the endsurfaces of the facing members when installing the joint member betweenthe wall surface facing members so as not to interfere with working.When press-fitting the core member 110 into the gap between the sideplates 112 and 112, the contact pressure of the respective sealingtongue flaps 114 a, 114 b, and 114 c is successfully applied to theinner walls W of the joint groove, thus permitting good sealing effectto be achieved.

The joint member described above can be easily installed in a drymanner, without sacrificing an appearance, in a joint groove required tosecure water-tightness between adjacent wall surface facing members A ofa building. Moreover, since the joiner 104 itself is provided integrallywith the sealing structural member 106 for easily sealing a jointgroove, reliable sealing can be accomplished easily at low cost.

REFERENCE NUMERALS

2 Joint member

4 Joiner

6 Joint base member

8 Sealant

10 Core member

10A Core portion

10B Head portion

10 a Distal end

10 b Both wings

12 Side plates

14 a Sealing tongue flap

14 5 Sealing tongue flap

14 c Protuberance

16 Aperture

18 Mouth portion

20A Mold release sheet

20B Mold release sheet

22 Engaging portion

24 Engaging portion

26 Covering member

27 Core member

27A Core portion

27B Head portion

27 a Protuberance

32 Joint member

34 Joiner

35 Leg

36 Joint base member

44 Sealing tongue flap

44 c Protuberance

50 Joiner

51 Bed member

50 a Both projecting side surfaces

52 Sealant

102 Joint member

104 Joiner

106 Sealing structural member

110 Core member

110A Core portion

110B Head portion

110 b Wing

112 Side plates

114 a Sealing tongue flap

114 b Sealing tongue flap

114 c Sealing tongue flap

116 Engaging portion

116A Engaging hook

116B Engaging groove

28 Engaging portion

A Wall surface facing member

B Waterproof sheet

C Furring strip

D Nail

D₁ Nail

S1 Space

S2 Space

S3 Sealant charge area

W Inner wall

118 Projection

What is claimed is:
 1. A joint member comprising: a joint base memberintegrally installed on a surface of a synthetic resin joiner providedbetween wall surface facing members on a bed surface of a buildingfacing, wherein: said joint base member comprises right and left sideplates, at least two soft sealing tongue flaps protuberantly provided onouter side surfaces of said side plates, distal ends thereof contactingend surfaces of the wall surface facing members of a joint groove, andnumerous apertures drilled between said sealing tongue flaps in saidside plates; a sufficient amount of sealant configured to fill a spacebetween the side plates, which is sufficient to seal a space surroundedby a pair of sealing tongue flaps and the inner side walls of the jointgroove, charged between the side plates of said joint base member, and asealing member for restraining outflow of the sealant attached to amouth portion between the side plates of said joint base member; and acore member pushed between the side plates of said joint base memberformed of a core portion configured to press out the sealant, which hasbeen charged by being pushed into the space between said side plates,through the apertures of said side plates, and a jaw plate of a headportion covering a joint groove mouth portion, said core portion andsaid jaw plate comprising a substantially T-shaped section, and saidcore portion does not reach a bottom part of a sealant charge areabetween said sides plates.
 2. A joint member comprising: a joint basemember integrally installed on a surface of a synthetic resin joinerprovided between wall surface facing members on a bed surface of abuilding facing, wherein: said joint base member comprises right andleft side plates, at least two soft sealing tongue flaps protuberantlyprovided on outer side surfaces of said side plates, distal ends thereofcontacting end surfaces of the wall surface facing members of a jointgroove, and numerous apertures drilled between said sealing tongue flapsin said side plates; a sufficient amount of sealant configured to fill aspace between the side plates, which is sufficient to seal a spacesurrounded by a pair of sealing tongue flaps and the inner side walls ofthe joint groove, is charged between the side plates of said joint basemember, and a covering member configured to restrain outflow of thesealant and configured to restrain a mouth portion between the sideplates from narrowing is fitted into the mouth portion; and a coremember pushed between the side plates of said joint base member formedof a core portion configured to push between said side plates whilepressing the covering member so as to press out the sealant, which hasbeen charged therein, through the apertures of said side plates, and ajaw plate of a head portion covering a joint groove mouth portion, saidcore portion and said jaw plate comprising a substantially T-shapedsection, and said core portion not causing a distal end of the coveringmember to reach a bottom part of a sealant charge area between saidsides plates.
 3. A joint member according to claim 1, wherein a spaceinto which the remainder of a sealant, which is pressed into the spacesurrounded by the pair of sealing tongue flaps and the inner walls ofthe joint groove when the core member is pushed into the gap between theside plates, flows is formed between sealing tongue flaps on a joinerside in the side plates of the joint base member and the joiner.
 4. Ajoint member according to claim 1 or 2, wherein protuberances located onouter side surfaces of the side plates configured to set a minimum widthof the joint groove are formed on proximal ends of at least one set ofsealing tongue flaps at opposing positions of the side plates.
 5. Aninstallation method for installing the joint member according to claim1, comprising: providing a joiner by positioning a joint base memberbetween wall surface facing members on a bed surface of a buildingfacing; and pushing a core portion of a core member into a gap betweenthe side plates of the joint base member filled with a sealant to pushsaid sealant into a space surrounded by a pair of sealing tongue flapsprotuberantly provided on outer side surfaces of said side plates andinner walls of a joint groove through apertures of the side plates, andcovering a mouth portion of the joint groove by a jaw plate of a coremember head portion.
 6. An installation method for installing the jointmember according to claim 2, comprising: providing a joiner bypositioning a joint base member between wall surface facing members on abed surface of a building facing; and pushing a core portion of a coremember into a gap between the side plates of the joint base memberfilled with a sealant while pushing a covering member, which has beenfitted into a mouth portion between the two side plates, so as to pushsaid sealant into a space surrounded by a pair of sealing tongue flapsprotuberantly provided on outer side surfaces of said side plates andinner walls of a joint groove through apertures of the side plates, andfor covering a mouth portion of the joint groove by a jaw plate of acore member head portion.
 7. A joint member according to claim 2,wherein a space into which the remainder of a sealant, which is pressedinto the space surrounded by the pair of sealing tongue flaps and theinner walls of the joint groove when the core member is pushed into thegap between the side plates, flows is formed between sealing tongueflaps on a joiner side in the side plates of the joint base member andthe joiner.
 8. A joint member according to claim 2, whereinprotuberances for setting a minimum width of the joint groove are formedon proximal ends of at least one set of sealing tongue flaps at opposingpositions of the two side plates, the protuberances being located onouter side surfaces of the two side plates in the joint base member.